Gordian III and Tranquillina, AE 27 of Anchialus, Thrace.

AYT K M ANT GORDIANOC AYG CEB TRANKYLLEINA, laureate 
and draped bust of Gordian right, facing draped bust of 
Tranquillina left.
OVLPIANWN AGXIALEWN, Tetrastyle temple containing statue 
of Apollo Saurocton resting elbow on tree trunk, right 
hand above his head.

Varbanov 728 var (obv. legend with CEB instead of CAB).